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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4165) An outstanding container request makes all nodes to be reserved causing all jobs pending
Date Wed, 16 Sep 2015 13:15:46 GMT

    [ https://issues.apache.org/jira/browse/YARN-4165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14768915#comment-14768915
] 

Jason Lowe commented on YARN-4165:
----------------------------------

Is this with the fair scheduler?  I don't believe the capacity scheduler has this issue after
YARN-957 which was fixed a long time ago.

> An outstanding container request makes all nodes to be reserved causing all jobs pending
> ----------------------------------------------------------------------------------------
>
>                 Key: YARN-4165
>                 URL: https://issues.apache.org/jira/browse/YARN-4165
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: resourcemanager, scheduler
>    Affects Versions: 2.7.1
>            Reporter: Weiwei Yang
>            Assignee: Weiwei Yang
>
> We have a long running service in YARN, it has a outstanding container request that YARN
cannot satisfy (require more memory that nodemanager can supply). Then YARN reserves all nodes
for this application, when I submit other jobs (require relative small memory that nodemanager
can supply), all jobs are pending because YARN skips scheduling containers on the nodes that
have been reserved.



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